UDEC simulation results show that the porosity of overburden rock fissure field in goaf and its curve is saddle-shaped.
UDEC模拟结果表明，采空区覆岩裂隙区域孔隙率曲线呈鞍状分布。
It is important to master movement rules of overburden rock layers to control roof rationally in special production and geological conditions.
在工作面特定的生产技术和地质条件下，掌握工作面上覆岩层的运动规律，对合理控制顶板非常重要。
The essential elements are source rock, reservoir rock, seal rock and overburden rock, and the processes include trap formation and the generation-migration-accumulation of petroleum.
基本要素包括一套烃源岩、储集层、盖层和上覆岩层，作用是圈闭的形成和油气的生成—运移—聚集。
The coal mining around the water-bearing structure is simulated by tests. The variation laws of seepage and temperature fields induced by deformation of overburden rock during mining are analyzed.
对含水构造附近的煤层开采进行试验模拟，重点分析采动过程中覆岩变形引起渗流场、温度场的变化规律。
The pressure of the weight of overburden, or overlying rock, on a formation; also called geostatic pressure.
上覆层或上覆岩石的重量对地层的压力，也称为地静压力。
Discussed rock mass gravity collapse mechanism caused by under ground and overburden failure and surface settlement disaster, offered some underground mining and surface protective measures.
论述了地下矿层开采引起的岩体重力变形机理和造成的覆岩破坏、地表沉陷等灾害，提出了井下开采和井上防护的技术措施。
We could determine the overburden thickness by contrast the electric property difference of the underlying original rock and the overburden.
该方法可利用覆盖层与下部基岩存在的电性差异来测定覆盖层的厚度。
The lateral overburden of faults is "wedge" shaped, and mining stress is lower than that of the stress of the primary rock.
断层外侧覆岩呈“楔形”，采动应力低于原岩应力。
In the present paper, the influences of overburden and cavern sectional shape as well as in-situ stress condition on the characteristics of rock cavern under earthquake are analyzed by using FLAC 3 d.
本文利用FLAC3D软件，初步分析了地震荷载作用下埋深、洞室形状、地应力特征对地下岩体洞室响应特征的影响。
The Northeast of our country, being a forest-covered areas, where vegetation grows fully and covers heavily, low-resistivity overburden in this areas is thick and rock outcropping is sparse.
我国东北森林覆盖区地表植被发育，低阻盖层较厚，岩石露头少，常规直流电法低阻屏闭影响严重。
What can be done if the overburden is hard rock?
如果剥离物是硬岩，怎么办呢？
The analysis of 3D elasto-plastic FEM is introduced for calculating the deformation of the ground surface caused by underground mining under thick rock overburden.
介绍了在厚覆盖岩层条件下，确定地下采矿引起地表变形特征的三维有限元弹塑性计算分析工作。
The analysis of 3D elasto-plastic FEM is introduced for calculating the deformation of the ground surface caused by underground mining under thick rock overburden.
介绍了在厚覆盖岩层条件下，确定地下采矿引起地表变形特征的三维有限元弹塑性计算分析工作。
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